man, that's a bonified bummer, at least both damaged sides matched.
I've had several tire gages, and they all registered a little different, a couple of them way off. I keep track of inflation by inspecting the edge of each tire to see if the worn area hits right at the edge, down over edge, too soft, toward middle, too hard. Although, if the rig is overloaded, will have to overinflate to keep the tires looking right, not good in that case.
Once in a while I'll take my gages into Les Schwab and asked them to compare mine with theirs, some matched, some didn't.
